1 /*
2 * Copyright (c) 1999, 2021, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.tools.javac.code;
27
28 import java.util.Collection;
29 import java.util.Collections;
30 import java.util.EnumSet;
31 import java.util.HashMap;
32 import java.util.LinkedHashMap;
33 import java.util.Map;
34
35 import javax.lang.model.element.ElementVisitor;
36
37 import com.sun.tools.javac.code.Scope.WriteableScope;
38 import com.sun.tools.javac.code.Source.Feature;
39 import com.sun.tools.javac.code.Symbol.ClassSymbol;
40 import com.sun.tools.javac.code.Symbol.Completer;
41 import com.sun.tools.javac.code.Symbol.CompletionFailure;
42 import com.sun.tools.javac.code.Symbol.MethodSymbol;
43 import com.sun.tools.javac.code.Symbol.ModuleSymbol;
44 import com.sun.tools.javac.code.Symbol.PackageSymbol;
45 import com.sun.tools.javac.code.Symbol.RootPackageSymbol;
46 import com.sun.tools.javac.code.Symbol.TypeSymbol;
47 import com.sun.tools.javac.code.Symbol.VarSymbol;
48 import com.sun.tools.javac.code.Type.BottomType;
49 import com.sun.tools.javac.code.Type.ClassType;
50 import com.sun.tools.javac.code.Type.ErrorType;
51 import com.sun.tools.javac.code.Type.JCPrimitiveType;
52 import com.sun.tools.javac.code.Type.JCVoidType;
53 import com.sun.tools.javac.code.Type.MethodType;
54 import com.sun.tools.javac.code.Type.UnknownType;
55 import com.sun.tools.javac.code.Type.WildcardType;
56 import com.sun.tools.javac.code.Types.UniqueType;
57 import com.sun.tools.javac.comp.Modules;
58 import com.sun.tools.javac.jvm.Target;
59 import com.sun.tools.javac.util.Assert;
60 import com.sun.tools.javac.util.Context;
61 import com.sun.tools.javac.util.Convert;
62 import com.sun.tools.javac.util.DefinedBy;
63 import com.sun.tools.javac.util.DefinedBy.Api;
64 import com.sun.tools.javac.util.Iterators;
65 import com.sun.tools.javac.util.JavacMessages;
66 import com.sun.tools.javac.util.List;
67 import com.sun.tools.javac.util.Name;
68 import com.sun.tools.javac.util.Names;
69 import com.sun.tools.javac.util.Options;
70
71 import static com.sun.tools.javac.code.Flags.*;
72 import static com.sun.tools.javac.code.Kinds.Kind.*;
73 import static com.sun.tools.javac.code.TypeTag.*;
74
75 /** A class that defines all predefined constants and operators
76 * as well as special classes such as java.lang.Object, which need
77 * to be known to the compiler. All symbols are held in instance
78 * fields. This makes it possible to work in multiple concurrent
79 * projects, which might use different class files for library classes.
80 *
81 * <p><b>This is NOT part of any supported API.
82 * If you write code that depends on this, you do so at your own risk.
83 * This code and its internal interfaces are subject to change or
84 * deletion without notice.</b>
85 */
86 public class Symtab {
87 /** The context key for the symbol table. */
88 protected static final Context.Key<Symtab> symtabKey = new Context.Key<>();
89
90 /** Get the symbol table instance. */
91 public static Symtab instance(Context context) {
92 Symtab instance = context.get(symtabKey);
93 if (instance == null)
94 instance = new Symtab(context);
95 return instance;
96 }
97
98 /** Builtin types.
99 */
100 public final JCPrimitiveType byteType = new JCPrimitiveType(BYTE, null);
101 public final JCPrimitiveType charType = new JCPrimitiveType(CHAR, null);
102 public final JCPrimitiveType shortType = new JCPrimitiveType(SHORT, null);
103 public final JCPrimitiveType intType = new JCPrimitiveType(INT, null);
104 public final JCPrimitiveType longType = new JCPrimitiveType(LONG, null);
105 public final JCPrimitiveType floatType = new JCPrimitiveType(FLOAT, null);
106 public final JCPrimitiveType doubleType = new JCPrimitiveType(DOUBLE, null);
107 public final JCPrimitiveType booleanType = new JCPrimitiveType(BOOLEAN, null);
108 public final Type botType = new BottomType();
109 public final JCVoidType voidType = new JCVoidType();
110
111 private final Names names;
112 private final JavacMessages messages;
113 private final Completer initialCompleter;
114 private final Completer moduleCompleter;
115
116 /** A symbol for the unnamed module.
117 */
118 public final ModuleSymbol unnamedModule;
119
120 /** The error module.
121 */
122 public final ModuleSymbol errModule;
123
124 /** A symbol for no module, for use with -source 8 or less
125 */
126 public final ModuleSymbol noModule;
127
128 /** A symbol for the root package.
129 */
130 public final PackageSymbol rootPackage;
131
132 /** A symbol that stands for a missing symbol.
133 */
134 public final TypeSymbol noSymbol;
135
136 /** The error symbol.
137 */
138 public final ClassSymbol errSymbol;
139
140 /** The unknown symbol.
141 */
142 public final ClassSymbol unknownSymbol;
143
144 /** A value for the errType, with a originalType of noType */
145 public final Type errType;
146
147 /** A value for the unknown type. */
148 public final Type unknownType;
149
150 /** The builtin type of all arrays. */
151 public final ClassSymbol arrayClass;
152 public final MethodSymbol arrayCloneMethod;
153
154 /** VGJ: The (singleton) type of all bound types. */
155 public final ClassSymbol boundClass;
156
157 /** The builtin type of all methods. */
158 public final ClassSymbol methodClass;
159
160 /** A symbol for the java.base module.
161 */
162 public final ModuleSymbol java_base;
163
164 /** Predefined types.
165 */
166 public final Type objectType;
167 public final Type objectMethodsType;
168 public final Type objectsType;
169 public final Type classType;
170 public final Type classLoaderType;
171 public final Type stringType;
172 public final Type stringBufferType;
173 public final Type stringBuilderType;
174 public final Type cloneableType;
175 public final Type serializableType;
176 public final Type serializedLambdaType;
177 public final Type varHandleType;
178 public final Type methodHandleType;
179 public final Type methodHandleLookupType;
180 public final Type methodTypeType;
181 public final Type nativeHeaderType;
182 public final Type throwableType;
183 public final Type errorType;
184 public final Type interruptedExceptionType;
185 public final Type illegalArgumentExceptionType;
186 public final Type exceptionType;
187 public final Type runtimeExceptionType;
188 public final Type classNotFoundExceptionType;
189 public final Type noClassDefFoundErrorType;
190 public final Type noSuchFieldErrorType;
191 public final Type assertionErrorType;
192 public final Type incompatibleClassChangeErrorType;
193 public final Type cloneNotSupportedExceptionType;
194 public final Type annotationType;
195 public final TypeSymbol enumSym;
196 public final Type listType;
197 public final Type collectionsType;
198 public final Type comparableType;
199 public final Type comparatorType;
200 public final Type arraysType;
201 public final Type iterableType;
202 public final Type iteratorType;
203 public final Type annotationTargetType;
204 public final Type overrideType;
205 public final Type retentionType;
206 public final Type deprecatedType;
207 public final Type suppressWarningsType;
208 public final Type supplierType;
209 public final Type inheritedType;
210 public final Type profileType;
211 public final Type proprietaryType;
212 public final Type systemType;
213 public final Type autoCloseableType;
214 public final Type trustMeType;
215 public final Type lambdaMetafactory;
216 public final Type stringConcatFactory;
217 public final Type repeatableType;
218 public final Type documentedType;
219 public final Type elementTypeType;
220 public final Type functionalInterfaceType;
221 public final Type previewFeatureType;
222 public final Type previewFeatureInternalType;
223 public final Type typeDescriptorType;
224 public final Type recordType;
225 public final Type identityObjectType;
226 public final Type primitiveObjectType;
227 public final Type switchBootstrapsType;
228 public final Type valueBasedType;
229 public final Type valueBasedInternalType;
230
231 /** The symbol representing the length field of an array.
232 */
233 public final VarSymbol lengthVar;
234
235 /** The symbol representing the final finalize method on enums */
236 public final MethodSymbol enumFinalFinalize;
237
238 /** The symbol representing the close method on TWR AutoCloseable type */
239 public final MethodSymbol autoCloseableClose;
240
241 /** The predefined type that belongs to a tag.
242 */
243 public final Type[] typeOfTag = new Type[TypeTag.getTypeTagCount()];
244
245 /** The name of the class that belongs to a basic type tag.
246 */
247 public final Name[] boxedName = new Name[TypeTag.getTypeTagCount()];
248
249 /** A hashtable containing the encountered top-level and member classes,
250 * indexed by flat names. The table does not contain local classes.
251 * It should be updated from the outside to reflect classes defined
252 * by compiled source files.
253 */
254 private final Map<Name, Map<ModuleSymbol,ClassSymbol>> classes = new HashMap<>();
255
256 /** A hashtable containing the encountered packages.
257 * the table should be updated from outside to reflect packages defined
258 * by compiled source files.
259 */
260 private final Map<Name, Map<ModuleSymbol,PackageSymbol>> packages = new HashMap<>();
261
262 /** A hashtable giving the encountered modules.
263 */
264 private final Map<Name, ModuleSymbol> modules = new LinkedHashMap<>();
265
266 private final Map<Types.UniqueType, VarSymbol> classFields = new HashMap<>();
267
268 public VarSymbol getClassField(Type type, Types types) {
269 return classFields.computeIfAbsent(
270 new UniqueType(type, types), k -> {
271 Type arg = null;
272 if (type.getTag() == ARRAY || type.getTag() == CLASS) {
273 /* Temporary treatment for primitive class: Given a primitive class V that implements
274 I1, I2, ... In, V.class is typed to be Class<? extends Object & I1 & I2 .. & In>
275 */
276 if (type.isPrimitiveClass()) {
277 List<Type> bounds = List.of(objectType).appendList(((ClassSymbol) type.tsym).getInterfaces());
278 arg = new WildcardType(bounds.size() > 1 ? types.makeIntersectionType(bounds) : objectType, BoundKind.EXTENDS, boundClass);
279 } else {
280 arg = types.erasure(type);
281 }
282 }
283 else if (type.isPrimitiveOrVoid())
284 arg = types.boxedClass(type).type;
285 else
286 throw new AssertionError(type);
287
288 Type t = new ClassType(
289 classType.getEnclosingType(), List.of(arg), classType.tsym);
290 return new VarSymbol(
291 STATIC | PUBLIC | FINAL, names._class, t, type.tsym);
292 });
293 }
294
295 public void initType(Type type, ClassSymbol c) {
296 type.tsym = c;
297 typeOfTag[type.getTag().ordinal()] = type;
298 }
299
300 public void initType(Type type, String name) {
301 initType(
302 type,
303 new ClassSymbol(
304 PUBLIC, names.fromString(name), type, rootPackage));
305 }
306
307 public void initType(Type type, String name, String bname) {
308 initType(type, name);
309 boxedName[type.getTag().ordinal()] = names.fromString("java.lang." + bname);
310 }
311
312 /** The class symbol that owns all predefined symbols.
313 */
314 public final ClassSymbol predefClass;
315
316 /** Enter a class into symbol table.
317 * @param s The name of the class.
318 */
319 private Type enterClass(String s) {
320 return enterClass(java_base, names.fromString(s)).type;
321 }
322
323 public void synthesizeEmptyInterfaceIfMissing(final Type type) {
324 final Completer completer = type.tsym.completer;
325 type.tsym.completer = new Completer() {
326 @Override
327 public void complete(Symbol sym) throws CompletionFailure {
328 try {
329 completer.complete(sym);
330 } catch (CompletionFailure e) {
331 sym.flags_field |= (PUBLIC | INTERFACE);
332 ((ClassType) sym.type).supertype_field = objectType;
333 }
334 }
335
336 @Override
337 public boolean isTerminal() {
338 return completer.isTerminal();
339 }
340 };
341 }
342
343 public void synthesizeBoxTypeIfMissing(final Type type) {
344 ClassSymbol sym = enterClass(java_base, boxedName[type.getTag().ordinal()]);
345 final Completer completer = sym.completer;
346 sym.completer = new Completer() {
347 @Override
348 public void complete(Symbol sym) throws CompletionFailure {
349 try {
350 completer.complete(sym);
351 } catch (CompletionFailure e) {
352 sym.flags_field |= PUBLIC;
353 ((ClassType) sym.type).supertype_field = objectType;
354 MethodSymbol boxMethod =
355 new MethodSymbol(PUBLIC | STATIC, names.valueOf,
356 new MethodType(List.of(type), sym.type,
357 List.nil(), methodClass),
358 sym);
359 sym.members().enter(boxMethod);
360 MethodSymbol unboxMethod =
361 new MethodSymbol(PUBLIC,
362 type.tsym.name.append(names.Value), // x.intValue()
363 new MethodType(List.nil(), type,
364 List.nil(), methodClass),
365 sym);
366 sym.members().enter(unboxMethod);
367 }
368 }
369
370 @Override
371 public boolean isTerminal() {
372 return completer.isTerminal();
373 }
374 };
375 }
376
377 // Enter a synthetic class that is used to mark classes in ct.sym.
378 // This class does not have a class file.
379 private Type enterSyntheticAnnotation(String name) {
380 // for now, leave the module null, to prevent problems from synthesizing the
381 // existence of a class in any specific module, including noModule
382 ClassType type = (ClassType)enterClass(java_base, names.fromString(name)).type;
383 ClassSymbol sym = (ClassSymbol)type.tsym;
384 sym.completer = Completer.NULL_COMPLETER;
385 sym.flags_field = PUBLIC|ACYCLIC|ANNOTATION|INTERFACE;
386 sym.erasure_field = type;
387 sym.members_field = WriteableScope.create(sym);
388 type.typarams_field = List.nil();
389 type.allparams_field = List.nil();
390 type.supertype_field = annotationType;
391 type.interfaces_field = List.nil();
392 return type;
393 }
394
395 /** Constructor; enters all predefined identifiers and operators
396 * into symbol table.
397 */
398 protected Symtab(Context context) throws CompletionFailure {
399 context.put(symtabKey, this);
400
401 names = Names.instance(context);
402
403 // Create the unknown type
404 unknownType = new UnknownType();
405
406 messages = JavacMessages.instance(context);
407
408 MissingInfoHandler missingInfoHandler = MissingInfoHandler.instance(context);
409
410 Target target = Target.instance(context);
411 rootPackage = new RootPackageSymbol(names.empty, null,
412 missingInfoHandler,
413 target.runtimeUseNestAccess());
414
415 // create the basic builtin symbols
416 unnamedModule = new ModuleSymbol(names.empty, null) {
417 {
418 directives = List.nil();
419 exports = List.nil();
420 provides = List.nil();
421 uses = List.nil();
422 ModuleSymbol java_base = enterModule(names.java_base);
423 com.sun.tools.javac.code.Directive.RequiresDirective d =
424 new com.sun.tools.javac.code.Directive.RequiresDirective(java_base,
425 EnumSet.of(com.sun.tools.javac.code.Directive.RequiresFlag.MANDATED));
426 requires = List.of(d);
427 }
428 @Override
429 public String toString() {
430 return messages.getLocalizedString("compiler.misc.unnamed.module");
431 }
432 };
433 addRootPackageFor(unnamedModule);
434 unnamedModule.enclosedPackages = unnamedModule.enclosedPackages.prepend(unnamedModule.unnamedPackage);
435
436 errModule = new ModuleSymbol(names.empty, null) {
437 {
438 directives = List.nil();
439 exports = List.nil();
440 provides = List.nil();
441 uses = List.nil();
442 ModuleSymbol java_base = enterModule(names.java_base);
443 com.sun.tools.javac.code.Directive.RequiresDirective d =
444 new com.sun.tools.javac.code.Directive.RequiresDirective(java_base,
445 EnumSet.of(com.sun.tools.javac.code.Directive.RequiresFlag.MANDATED));
446 requires = List.of(d);
447 }
448 };
449 addRootPackageFor(errModule);
450
451 noModule = new ModuleSymbol(names.empty, null) {
452 @Override public boolean isNoModule() {
453 return true;
454 }
455 };
456 addRootPackageFor(noModule);
457
458 noSymbol = new TypeSymbol(NIL, 0, names.empty, Type.noType, rootPackage) {
459 @Override @DefinedBy(Api.LANGUAGE_MODEL)
460 public <R, P> R accept(ElementVisitor<R, P> v, P p) {
461 return v.visitUnknown(this, p);
462 }
463 };
464
465 // create the error symbols
466 errSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.any, null, rootPackage);
467 errType = new ErrorType(errSymbol, Type.noType);
468
469 unknownSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.fromString("<any?>"), null, rootPackage);
470 unknownSymbol.members_field = new Scope.ErrorScope(unknownSymbol);
471 unknownSymbol.type = unknownType;
472
473 // initialize builtin types
474 initType(byteType, "byte", "Byte");
475 initType(shortType, "short", "Short");
476 initType(charType, "char", "Character");
477 initType(intType, "int", "Integer");
478 initType(longType, "long", "Long");
479 initType(floatType, "float", "Float");
480 initType(doubleType, "double", "Double");
481 initType(booleanType, "boolean", "Boolean");
482 initType(voidType, "void", "Void");
483 initType(botType, "<nulltype>");
484 initType(errType, errSymbol);
485 initType(unknownType, unknownSymbol);
486
487 // the builtin class of all arrays
488 arrayClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Array, noSymbol);
489
490 // VGJ
491 boundClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Bound, noSymbol);
492 boundClass.members_field = new Scope.ErrorScope(boundClass);
493
494 // the builtin class of all methods
495 methodClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Method, noSymbol);
496 methodClass.members_field = new Scope.ErrorScope(boundClass);
497
498 // Create class to hold all predefined constants and operations.
499 predefClass = new ClassSymbol(PUBLIC|ACYCLIC, names.empty, rootPackage);
500 WriteableScope scope = WriteableScope.create(predefClass);
501 predefClass.members_field = scope;
502
503 // Get the initial completer for Symbols from the ClassFinder
504 initialCompleter = ClassFinder.instance(context).getCompleter();
505 rootPackage.members_field = WriteableScope.create(rootPackage);
506
507 // Enter symbols for basic types.
508 scope.enter(byteType.tsym);
509 scope.enter(shortType.tsym);
510 scope.enter(charType.tsym);
511 scope.enter(intType.tsym);
512 scope.enter(longType.tsym);
513 scope.enter(floatType.tsym);
514 scope.enter(doubleType.tsym);
515 scope.enter(booleanType.tsym);
516 scope.enter(errType.tsym);
517
518 // Enter symbol for the errSymbol
519 scope.enter(errSymbol);
520
521 Source source = Source.instance(context);
522 if (Feature.MODULES.allowedInSource(source)) {
523 java_base = enterModule(names.java_base);
524 //avoid completing java.base during the Symtab initialization
525 java_base.completer = Completer.NULL_COMPLETER;
526 java_base.visiblePackages = Collections.emptyMap();
527 } else {
528 java_base = noModule;
529 }
530
531 // Get the initial completer for ModuleSymbols from Modules
532 moduleCompleter = Modules.instance(context).getCompleter();
533
534 // Enter predefined classes. All are assumed to be in the java.base module.
535 objectType = enterClass("java.lang.Object");
536 objectMethodsType = enterClass("java.lang.runtime.ObjectMethods");
537 objectsType = enterClass("java.util.Objects");
538 classType = enterClass("java.lang.Class");
539 stringType = enterClass("java.lang.String");
540 stringBufferType = enterClass("java.lang.StringBuffer");
541 stringBuilderType = enterClass("java.lang.StringBuilder");
542 cloneableType = enterClass("java.lang.Cloneable");
543 throwableType = enterClass("java.lang.Throwable");
544 serializableType = enterClass("java.io.Serializable");
545 serializedLambdaType = enterClass("java.lang.invoke.SerializedLambda");
546 varHandleType = enterClass("java.lang.invoke.VarHandle");
547 methodHandleType = enterClass("java.lang.invoke.MethodHandle");
548 methodHandleLookupType = enterClass("java.lang.invoke.MethodHandles$Lookup");
549 methodTypeType = enterClass("java.lang.invoke.MethodType");
550 errorType = enterClass("java.lang.Error");
551 illegalArgumentExceptionType = enterClass("java.lang.IllegalArgumentException");
552 interruptedExceptionType = enterClass("java.lang.InterruptedException");
553 exceptionType = enterClass("java.lang.Exception");
554 runtimeExceptionType = enterClass("java.lang.RuntimeException");
555 classNotFoundExceptionType = enterClass("java.lang.ClassNotFoundException");
556 noClassDefFoundErrorType = enterClass("java.lang.NoClassDefFoundError");
557 noSuchFieldErrorType = enterClass("java.lang.NoSuchFieldError");
558 assertionErrorType = enterClass("java.lang.AssertionError");
559 incompatibleClassChangeErrorType = enterClass("java.lang.IncompatibleClassChangeError");
560 cloneNotSupportedExceptionType = enterClass("java.lang.CloneNotSupportedException");
561 annotationType = enterClass("java.lang.annotation.Annotation");
562 classLoaderType = enterClass("java.lang.ClassLoader");
563 enumSym = enterClass(java_base, names.java_lang_Enum);
564 enumFinalFinalize =
565 new MethodSymbol(PROTECTED|FINAL|HYPOTHETICAL,
566 names.finalize,
567 new MethodType(List.nil(), voidType,
568 List.nil(), methodClass),
569 enumSym);
570 listType = enterClass("java.util.List");
571 collectionsType = enterClass("java.util.Collections");
572 comparableType = enterClass("java.lang.Comparable");
573 comparatorType = enterClass("java.util.Comparator");
574 arraysType = enterClass("java.util.Arrays");
575 iterableType = enterClass("java.lang.Iterable");
576 iteratorType = enterClass("java.util.Iterator");
577 annotationTargetType = enterClass("java.lang.annotation.Target");
578 overrideType = enterClass("java.lang.Override");
579 retentionType = enterClass("java.lang.annotation.Retention");
580 deprecatedType = enterClass("java.lang.Deprecated");
581 suppressWarningsType = enterClass("java.lang.SuppressWarnings");
582 supplierType = enterClass("java.util.function.Supplier");
583 inheritedType = enterClass("java.lang.annotation.Inherited");
584 repeatableType = enterClass("java.lang.annotation.Repeatable");
585 documentedType = enterClass("java.lang.annotation.Documented");
586 elementTypeType = enterClass("java.lang.annotation.ElementType");
587 systemType = enterClass("java.lang.System");
588 autoCloseableType = enterClass("java.lang.AutoCloseable");
589 autoCloseableClose = new MethodSymbol(PUBLIC,
590 names.close,
591 new MethodType(List.nil(), voidType,
592 List.of(exceptionType), methodClass),
593 autoCloseableType.tsym);
594 trustMeType = enterClass("java.lang.SafeVarargs");
595 nativeHeaderType = enterClass("java.lang.annotation.Native");
596 lambdaMetafactory = enterClass("java.lang.invoke.LambdaMetafactory");
597 stringConcatFactory = enterClass("java.lang.invoke.StringConcatFactory");
598 functionalInterfaceType = enterClass("java.lang.FunctionalInterface");
599 previewFeatureType = enterClass("jdk.internal.javac.PreviewFeature");
600 previewFeatureInternalType = enterSyntheticAnnotation("jdk.internal.PreviewFeature+Annotation");
601 typeDescriptorType = enterClass("java.lang.invoke.TypeDescriptor");
602 recordType = enterClass("java.lang.Record");
603 identityObjectType = enterClass("java.lang.IdentityObject");
604 primitiveObjectType = enterClass("java.lang.PrimitiveObject");
605 switchBootstrapsType = enterClass("java.lang.runtime.SwitchBootstraps");
606 valueBasedType = enterClass("jdk.internal.ValueBased");
607 valueBasedInternalType = enterSyntheticAnnotation("jdk.internal.ValueBased+Annotation");
608
609 synthesizeEmptyInterfaceIfMissing(autoCloseableType);
610 synthesizeEmptyInterfaceIfMissing(cloneableType);
611 synthesizeEmptyInterfaceIfMissing(serializableType);
612 synthesizeEmptyInterfaceIfMissing(lambdaMetafactory);
613 synthesizeEmptyInterfaceIfMissing(serializedLambdaType);
614 synthesizeEmptyInterfaceIfMissing(stringConcatFactory);
615 synthesizeEmptyInterfaceIfMissing(identityObjectType);
616 synthesizeEmptyInterfaceIfMissing(primitiveObjectType);
617 synthesizeBoxTypeIfMissing(doubleType);
618 synthesizeBoxTypeIfMissing(floatType);
619 synthesizeBoxTypeIfMissing(voidType);
620
621 // Enter a synthetic class that is used to mark internal
622 // proprietary classes in ct.sym. This class does not have a
623 // class file.
624 proprietaryType = enterSyntheticAnnotation("sun.Proprietary+Annotation");
625
626 // Enter a synthetic class that is used to provide profile info for
627 // classes in ct.sym. This class does not have a class file.
628 profileType = enterSyntheticAnnotation("jdk.Profile+Annotation");
629 MethodSymbol m = new MethodSymbol(PUBLIC | ABSTRACT, names.value, intType, profileType.tsym);
630 profileType.tsym.members().enter(m);
631
632 // Enter a class for arrays.
633 // The class implements java.lang.Cloneable and java.io.Serializable.
634 // It has a final length field and a clone method.
635 ClassType arrayClassType = (ClassType)arrayClass.type;
636 arrayClassType.supertype_field = objectType;
637 arrayClassType.interfaces_field =
638 List.of(cloneableType, serializableType, identityObjectType);
639
640 arrayClass.members_field = WriteableScope.create(arrayClass);
641 lengthVar = new VarSymbol(
642 PUBLIC | FINAL,
643 names.length,
644 intType,
645 arrayClass);
646 arrayClass.members().enter(lengthVar);
647 arrayCloneMethod = new MethodSymbol(
648 PUBLIC,
649 names.clone,
650 new MethodType(List.nil(), objectType,
651 List.nil(), methodClass),
652 arrayClass);
653 arrayClass.members().enter(arrayCloneMethod);
654
655 if (java_base != noModule)
656 java_base.completer = moduleCompleter::complete; //bootstrap issues
657
658 }
659
660 /** Define a new class given its name and owner.
661 */
662 public ClassSymbol defineClass(Name name, Symbol owner) {
663 ClassSymbol c = new ClassSymbol(0, name, owner);
664 c.completer = initialCompleter;
665 return c;
666 }
667
668 /** Create a new toplevel or member class symbol with given name
669 * and owner and enter in `classes' unless already there.
670 */
671 public ClassSymbol enterClass(ModuleSymbol msym, Name name, TypeSymbol owner) {
672 Assert.checkNonNull(msym);
673 Name flatname = TypeSymbol.formFlatName(name, owner);
674 ClassSymbol c = getClass(msym, flatname);
675 if (c == null) {
676 c = defineClass(name, owner);
677 doEnterClass(msym, c);
678 } else if ((c.name != name || c.owner != owner) && owner.kind == TYP && c.owner.kind == PCK) {
679 // reassign fields of classes that might have been loaded with
680 // their flat names.
681 c.owner.members().remove(c);
682 c.name = name;
683 c.owner = owner;
684 c.fullname = ClassSymbol.formFullName(name, owner);
685 }
686 return c;
687 }
688
689 public ClassSymbol getClass(ModuleSymbol msym, Name flatName) {
690 Assert.checkNonNull(msym, flatName::toString);
691 return classes.getOrDefault(flatName, Collections.emptyMap()).get(msym);
692 }
693
694 public PackageSymbol lookupPackage(ModuleSymbol msym, Name flatName) {
695 return lookupPackage(msym, flatName, false);
696 }
697
698 private PackageSymbol lookupPackage(ModuleSymbol msym, Name flatName, boolean onlyExisting) {
699 Assert.checkNonNull(msym);
700
701 if (flatName.isEmpty()) {
702 //unnamed packages only from the current module - visiblePackages contains *root* package, not unnamed package!
703 return msym.unnamedPackage;
704 }
705
706 if (msym == noModule) {
707 return enterPackage(msym, flatName);
708 }
709
710 msym.complete();
711
712 PackageSymbol pack;
713
714 pack = msym.visiblePackages.get(flatName);
715
716 if (pack != null)
717 return pack;
718
719 pack = getPackage(msym, flatName);
720
721 if ((pack != null && pack.exists()) || onlyExisting)
722 return pack;
723
724 boolean dependsOnUnnamed = msym.requires != null &&
725 msym.requires.stream()
726 .map(rd -> rd.module)
727 .anyMatch(mod -> mod == unnamedModule);
728
729 if (dependsOnUnnamed) {
730 //msyms depends on the unnamed module, for which we generally don't know
731 //the list of packages it "exports" ahead of time. So try to lookup the package in the
732 //current module, and in the unnamed module and see if it exists in one of them
733 PackageSymbol unnamedPack = getPackage(unnamedModule, flatName);
734
735 if (unnamedPack != null && unnamedPack.exists()) {
736 msym.visiblePackages.put(unnamedPack.fullname, unnamedPack);
737 return unnamedPack;
738 }
739
740 pack = enterPackage(msym, flatName);
741 pack.complete();
742 if (pack.exists())
743 return pack;
744
745 unnamedPack = enterPackage(unnamedModule, flatName);
746 unnamedPack.complete();
747 if (unnamedPack.exists()) {
748 msym.visiblePackages.put(unnamedPack.fullname, unnamedPack);
749 return unnamedPack;
750 }
751
752 return pack;
753 }
754
755 return enterPackage(msym, flatName);
756 }
757
758 private static final Map<ModuleSymbol, ClassSymbol> EMPTY = new HashMap<>();
759
760 public void removeClass(ModuleSymbol msym, Name flatName) {
761 classes.getOrDefault(flatName, EMPTY).remove(msym);
762 }
763
764 public Iterable<ClassSymbol> getAllClasses() {
765 return () -> Iterators.createCompoundIterator(classes.values(), v -> v.values().iterator());
766 }
767
768 private void doEnterClass(ModuleSymbol msym, ClassSymbol cs) {
769 classes.computeIfAbsent(cs.flatname, n -> new HashMap<>()).put(msym, cs);
770 }
771
772 /** Create a new member or toplevel class symbol with given flat name
773 * and enter in `classes' unless already there.
774 */
775 public ClassSymbol enterClass(ModuleSymbol msym, Name flatname) {
776 Assert.checkNonNull(msym);
777 PackageSymbol ps = lookupPackage(msym, Convert.packagePart(flatname));
778 Assert.checkNonNull(ps);
779 Assert.checkNonNull(ps.modle);
780 ClassSymbol c = getClass(ps.modle, flatname);
781 if (c == null) {
782 c = defineClass(Convert.shortName(flatname), ps);
783 doEnterClass(ps.modle, c);
784 return c;
785 } else
786 return c;
787 }
788
789 /** Check to see if a package exists, given its fully qualified name.
790 */
791 public boolean packageExists(ModuleSymbol msym, Name fullname) {
792 Assert.checkNonNull(msym);
793 PackageSymbol pack = lookupPackage(msym, fullname, true);
794 return pack != null && pack.exists();
795 }
796
797 /** Make a package, given its fully qualified name.
798 */
799 public PackageSymbol enterPackage(ModuleSymbol currModule, Name fullname) {
800 Assert.checkNonNull(currModule);
801 PackageSymbol p = getPackage(currModule, fullname);
802 if (p == null) {
803 Assert.check(!fullname.isEmpty(), () -> "rootPackage missing!; currModule: " + currModule);
804 p = new PackageSymbol(
805 Convert.shortName(fullname),
806 enterPackage(currModule, Convert.packagePart(fullname)));
807 p.completer = initialCompleter;
808 p.modle = currModule;
809 doEnterPackage(currModule, p);
810 }
811 return p;
812 }
813
814 private void doEnterPackage(ModuleSymbol msym, PackageSymbol pack) {
815 packages.computeIfAbsent(pack.fullname, n -> new HashMap<>()).put(msym, pack);
816 msym.enclosedPackages = msym.enclosedPackages.prepend(pack);
817 }
818
819 private void addRootPackageFor(ModuleSymbol module) {
820 doEnterPackage(module, rootPackage);
821 PackageSymbol unnamedPackage = new PackageSymbol(names.empty, rootPackage) {
822 @Override
823 public String toString() {
824 return messages.getLocalizedString("compiler.misc.unnamed.package");
825 }
826 };
827 unnamedPackage.modle = module;
828 //we cannot use a method reference below, as initialCompleter might be null now
829 unnamedPackage.completer = s -> initialCompleter.complete(s);
830 unnamedPackage.flags_field |= EXISTS;
831 module.unnamedPackage = unnamedPackage;
832 }
833
834 public PackageSymbol getPackage(ModuleSymbol module, Name fullname) {
835 return packages.getOrDefault(fullname, Collections.emptyMap()).get(module);
836 }
837
838 public ModuleSymbol enterModule(Name name) {
839 ModuleSymbol msym = modules.get(name);
840 if (msym == null) {
841 msym = ModuleSymbol.create(name, names.module_info);
842 addRootPackageFor(msym);
843 msym.completer = s -> moduleCompleter.complete(s); //bootstrap issues
844 modules.put(name, msym);
845 }
846 return msym;
847 }
848
849 public ModuleSymbol getModule(Name name) {
850 return modules.get(name);
851 }
852
853 //temporary:
854 public ModuleSymbol inferModule(Name packageName) {
855 if (packageName.isEmpty())
856 return java_base == noModule ? noModule : unnamedModule;//!
857
858 ModuleSymbol msym = null;
859 Map<ModuleSymbol,PackageSymbol> map = packages.get(packageName);
860 if (map == null)
861 return null;
862 for (Map.Entry<ModuleSymbol,PackageSymbol> e: map.entrySet()) {
863 if (!e.getValue().members().isEmpty()) {
864 if (msym == null) {
865 msym = e.getKey();
866 } else {
867 return null;
868 }
869 }
870 }
871 return msym;
872 }
873
874 public List<ModuleSymbol> listPackageModules(Name packageName) {
875 if (packageName.isEmpty())
876 return List.nil();
877
878 List<ModuleSymbol> result = List.nil();
879 Map<ModuleSymbol,PackageSymbol> map = packages.get(packageName);
880 if (map != null) {
881 for (Map.Entry<ModuleSymbol, PackageSymbol> e: map.entrySet()) {
882 if (!e.getValue().members().isEmpty()) {
883 result = result.prepend(e.getKey());
884 }
885 }
886 }
887 return result;
888 }
889
890 public Collection<ModuleSymbol> getAllModules() {
891 return modules.values();
892 }
893
894 public Iterable<ClassSymbol> getClassesForName(Name candidate) {
895 return classes.getOrDefault(candidate, Collections.emptyMap()).values();
896 }
897
898 public Iterable<PackageSymbol> getPackagesForName(Name candidate) {
899 return packages.getOrDefault(candidate, Collections.emptyMap()).values();
900 }
901 }